textproduct: Quad Cities

KEY MESSAGES

- Above normal temperatures are expected to continue this week and have a greater than 70% chance of continuing through the end of October.

SHORT TERM /THROUGH TUESDAY NIGHT/

Issued at 148 AM CDT Mon Oct 19 2026

High pressure over much of the eastern CONUS will continue to affect our weather over the next several days as it maintains a dry airmass. With this dry air in place, temperatures as of 1 AM have fallen into the 40s. With temperatures continuing to drop, isolated patches of frost may be possible across northwest Illinois, especially in poor drainage locations, through this morning.

Another lovely fall day is in store today, with highs in the upper 60s to around 70 degrees. A weak midlevel disturbance will bring some cloud cover through the afternoon and evening hours. Following this disturbance, the surface high pressure will shift over the Great lakes once more, returning surface winds to the southeast.

Tuesday will be yet another day in this pleasant stretch of fall weather. As weak WAA works its way into the region, temperatures and dewpoints will each climb by a couple degrees from what they were today.

LONG TERM /WEDNESDAY THROUGH SUNDAY/

Issued at 148 AM CDT Mon Oct 19 2026

Our week of dry and above normal fall weather will continue through the beginning of the weekend. By Wednesday, a trough moving into the Intermountain West will amplify the ridge, which in turn will increase both low level and surface temperatures. As a result, Thursday is expected to be the warmest day this week with highs in the 70s. Additionally, broad moisture advection will inch dewpoints up each day, which in addition to weak winds will mitigate any fire weather concerns.

Over the weekend, precipitation chances may return, though there is uncertainty in when, where, and to what degree based on model spread. Most guidance suggests the wave will not reach the area until at least Sunday. Due to the high uncertainty, this remains a period to watch while we enjoy the pleasant fall weather.

Lastly, an additional look ahead suggests that while this weekend system may bring brief near normal temperatures, it will not end our stretch of above normal temperatures. CPC highlights a very high combined probabilities (97%) for near normal to above normal temperatures through the end of October, as seen in the 6-10 and 8- 14 day outlooks.

AVIATION /12Z TAFS THROUGH 12Z TUESDAY/

Issued at 500 AM CDT Mon Oct 19 2026

VFR conditions to prevail through the period. High clouds will increase this afternoon and evening ahead of a weak shortwave. Winds to remain light under 10kts.

DVN WATCHES/WARNINGS/ADVISORIES

IA...None. IL...None. MO...None.